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A view through the Mark III Free Gun Reflector Sight, first produced in 1943, used on British army guns, naval guns, and as a pilot sight and a defensive gun sight on aircraft. The reticle image in this sight is produced by an optical collimator bounced off a beam splitter.
After the war, the semi-automatic concept started to gain currency in the U.S. Army. By the late 1920s, the Army was experimenting with several new semi-automatic rifle designs, including the Pedersen rifle firing a new .276 (7 mm) rifle cartridge. However, the Pedersen rifle lost to a new semi-automatic rifle designed by John C. Garand. The ...
The initial .303 Mark I and Mk II service cartridges used a 215-grain (13.9 g), round-nosed, copper-nickel full metal jacketed bullet with a lead core. After tests determined that the service bullet had too thin a jacket when used with cordite, the Mk II bullet was introduced, with a flat base and thicker copper-nickel jacket.
Originally (from 1889) Martini–Henry conversions used Metford rifled barrels (and were known as Martini–Metford rifles), which were more than suitable for the first .303 cartridges, which used black powder as a propellant but wore out very quickly when fired with cordite/nitrocellulose cartridges (introduced in 1895). In 1895, the Enfield ...
The Mark III rifles were newly made. They featured steel barrels which were so marked, flat nosed hammers, and a latch-locking breech block instead of the simple integral block lifting tang. The Snider–Enfield used a new type of metal-cased cartridge called a Boxer cartridge after its designer.
Drehvisier rotating drum sight pictures. The firearm is equipped with a relatively low iron sight line that consists of a Drehvisier a rotary rear drum and hooded front post. The rear sight is mechanically adjustable for both windage and elevation with the help of tools. This deliberately prevents non-armorers to (re)zero the iron sight line.
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Another cartridge conversion was the Pedersen device, which was designed to convert the bolt action Springfield 1903 Mark I into a 40 shot blowback semi-automatic firearm chambering a lengthened version of the .32 ACP cartridge. The 1903 Mark I differed from the standard rifle in that it had a slot cut in one side of the receiver, which served ...